Results 91 to 100 of about 10,104 (267)

Analysis of the pyrolytic behavior of benzoxazine-derived carbon/carbon composites

open access: yes, 2023
Gillespie, John W., Jr.Carbon-carbon composites (CCCs) are a form of carbon-fiber reinforced materials that exhibit excellent thermomechanical properties under extreme environmental conditions. To expand the applicability of CCCs, the fabrication process
Muhammed, Faheem Hameen
core   +1 more source

Synthesis of 1H-benzoxazine-2,4-diones from heterocyclic anhydrides: evaluation of antioxidant and antimicrobial activities

open access: yesQuímica Nova, 2014
A facile one-step synthesis of 1H-benzoxazine-2,4-diones from heterocyclic anhydrides and TMSA was described. This paper determines their antimicrobial activity against nine human bacterial pathogens by the broth microdilution method; antioxidant ...
Juan I. Sarmiento-Sánchez   +7 more
doaj   +1 more source

Synthesis and Thermal Curing of Benzoxazine Functionalized Polyurethanes

open access: yes, 2015
Benzoxazine (BOX) functionalized polyurethanes (PU) are introduced to provide a conceptually new thermal curing mechanism for polyurethanes. 3,4-Dihydro-3-methyl-2H-1,3-benzoxazine (P-m) was carefully oligomerized through thermal treatment.
Taden, A.   +5 more
core   +1 more source

C-2,8,14,20-tetra(propyl)-5,11,17,23-tetrakis(N–(piperidine)methyl)calix[4]resorcinarene

open access: yesMolbank
Calix[4]resorcinarenes are polyhydroxylated macrocyclic compounds with four units of resorcinol. These compounds can be derivatized through modifications at the upper rim, allowing reactivity with secondary amines to produce Mannich base derivatives via ...
Victor Alfonso Niño-Ramírez   +2 more
doaj   +1 more source

A microwave-catalyzed rapid, efficient and ecofriendly synthesis of substituted pyrazol-5-ones [PDF]

open access: yesJournal of the Serbian Chemical Society, 2003
A series of 1-(3,4-dihydro-3-oxo-2H-1,4-benzoxazine-2-carbonyl)-3-methyl-4-(substituted phenylhydrazono)-2-pyrazolin-5-ones have been synthesized by the reaction of 2H-3,4-dihydro-3-oxo-1,4-benzoxazine-2-carboxylic acid hydrazide with substituted ...
RAHUL P. GAVANDE, VIJAY V. DABHOLKAR
doaj  

Design and synthesis of thermally curable polymers with benzoxazine functionalities

open access: yes, 2006
in this paper, synthetic strategies for the preparation of structurally different polymers, namely polystyrene (PSt), poly(epsilon-caprolactone) (PCL), poly(propyleneoxicle) (PPO), poly(methyl methacrylate) (PMMA), and poly(styrene-altmaleimide) (PSt-alt-
Tasdelen, M. Atilla   +4 more
core   +1 more source

Benzoxazine Based Macromolecular Architecture

open access: yes, 2009
Tez (Doktora) -- İstanbul Teknik Üniversitesi, Fen Bilimleri Enstitüsü, 2009Thesis (PhD) -- İstanbul Technical University, Institute of Science and Technology, 2009Bu çalışmada, polibenzoksazinlerin işlenebilirliğini ve mekanik özelliklerini geliştirmek ...
Kışkan, Barış
core  

8-[2-Chloro-5-(trifluoromethyl)phenyl]-4H-[1,2,4]oxadiazolo-[3,4-c][1,4]benzoxazin-1-one

open access: yesMolbank, 2011
8-Bromo-4H-[1,2,4]oxadiazolo[3,4-c][1,4]benzoxazin-1-one 1 (NS2028) reacts with [2-chloro-5-(trifluoromethyl)phenyl]boronic acid 2 (2 equiv), Pd(OAc)2 (10 mol%) and KOAc (4 equiv) in acetonitrile heated to ca. 110 °C (sealed tube) for 12 hours to give 8-[
Andrey A. Berezin   +1 more
doaj   +1 more source

New Benzoxazine Secondary Metabolites from an Arctic Actinomycete

open access: yesMarine Drugs, 2014
Two new secondary metabolites, arcticoside (1) and C-1027 chromophore-V (2), were isolated along with C-1027 chromophore-III and fijiolides A and B (3–5) from a culture of an Arctic marine actinomycete Streptomyces strain.
Kyuho Moon   +9 more
doaj   +1 more source

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